Experimental analysis of microhardness changes of subsurface areas affected by WEDM

0561101 - ÚPT 2023 RIV GB eng J - Journal Article
Mouralová, K. - Michna, Š. - Zahradníček, R. - Bednář, J. - Plichta, Tomáš - Fries, J.
Experimental analysis of microhardness changes of subsurface areas affected by WEDM.
Proceedings of the Institution of Mechanical Engineers Part E-Journal of Process Mechanical Engineering. Roč. 236, č. 5 (2022), s. 1979-1991, č. článku 09544089221078383. ISSN 0954-4089. E-ISSN 2041-3009
Research Infrastructure: CzechNanoLab - 90110
Institutional support: RVO:68081731
Keywords : WEDM * electrical discharge machining * microhardness * machining parameters * subsurface layer
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 2.4, year: 2022
Method of publishing: Limited access
https://journals.sagepub.com/doi/10.1177/09544089221078383

The influence of the surface area by the impact of high temperatures after wire electric discharge machining (WEDM) is a known fact. However, the affected parameters also include a change in microhardness. In order to further investigate this statement, 5 different ferrous and non-ferrous materials were selected, from which three samples were always made with different settings of machine parameters (gap voltage, pulse on and off time, wire feed and discharge current). This examined not only the effect of the machining itself on the material but also whether the change in the microhardness of the material is affected by the setting of the machine parameters. In order to measure the microhardness of the subsurface layer, a metallographic preparation was made from each sample, which enabled accurate measurements always in the same area. Subsequent evaluation revealed that the microhardness may not be affected at all and everything depends only on the type of material being machined. The changes in microhardness affected by setting machine parameters are negligible.
Permanent Link: https://hdl.handle.net/11104/0333958